JP3956798B2 - Fastener driving position marking device for fastener driving machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a driver guided in an injection port formed in a nose portion is engaged with a fastener supplied in the injection port, and the driver is propelled and moved in the tip direction of the injection port by a driver driving mechanism. The present invention relates to a fastener driving position marking device for a fastener driving machine which is driven out from an outlet and driven into a workpiece.
[0002]
[Prior art]
As an example of a fastener driving machine, a nose part in which a screw injection port is formed at the front end of a housing is attached, and a connection screw accommodated in a magazine connected to the nose part is sequentially supplied into the injection port and compressed. A driver bit that is rotationally driven by air through an air motor is engaged with a screw supplied into the injection port to rotate the screw in the screwing direction, and a piston slidably accommodated in a cylinder is connected to the driver. In cooperation with the bit, the compressed air introduced into the cylinder is applied to the piston to drive the driver bit in the screwing direction, and the screw is driven out toward the workpiece arranged in front of the injection port. A screwing machine is known from JP-A-9-141571.
[0003]
[Problems to be solved by the invention]
In construction of gypsum board or the like in a residential building, there is a case where a construction interval of fasteners such as screws and nails is defined so that a predetermined construction strength can be maintained. In order to construct the fastener driving interval at a predetermined interval, it is possible to display a mark with a predetermined pitch on a gypsum board in advance, etc. The prescribed intervals vary depending on the construction method, and it is impossible to display the uniform interval marks uniformly on the construction material such as gypsum board. In the fastener driving operation by the conventional fastener driving machine, since the screw tightening and nailing are performed by register, the pitch is not equal and the pitch becomes large and the predetermined construction strength cannot be obtained, or The problem is that the pitch is reduced and screws and nails are wasted.
[0004]
The present invention solves the above-mentioned problems in the prior art, and displays the next fastener driving position on the surface of the construction material at the time of fastening the fastener with a fastener driving machine, so that the construction material such as gypsum board can be used. It is an object of the present invention to provide a fastener driving machine capable of screwing or nailing with a predetermined equal pitch.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, a fastener driving position marking device of a fastener driving machine according to the present invention includes a driver bit slidably guided in an injection port formed in a nose portion, and driving the driver bit in the injection port. A housing that houses the drive mechanism to be operated, and a magazine that is connected to the nose portion and accommodates a large number of fasteners, and the driver bit is propelled and driven by the injection port, and the fastener supplied into the injection port of the nose portion is In the fastener driving machine that is driven into the construction material arranged at the tip of the injection port, the bottom surface of the magazine is pressed against the surface of the construction material when the injection port is pressed against the surface of the construction material. A mark display means having a pointed portion capable of displaying a mark is provided .
[ 0006 ]
The invention according to claim 2 is characterized in that the mark forming member is held by a holder portion attached to the bottom surface of the magazine so that the distance from the center of the injection port can be variably adjusted.
[ 0007 ]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings. 1 and 2 show a compressed air-driven screw tightening machine as an example of a fastener driving machine in which the fastener driving position marking device of the present invention is implemented. The fastener driving machine 1 has a grip portion 3 formed integrally. A nose portion 4 forming an injection port 5 for guiding a screw toward a workpiece is attached below the housing 2. The nose portion 4 is connected to a magazine 6 that accommodates a number of connected screws, and a screw supply mechanism 8 formed on a supply guide surface 7 formed between the injection port 5 and the magazine 6. Thus, the connecting screws in the magazine 6 are sequentially supplied into the injection port 5 of the nose portion 4 along the supply guide surface 7.
[ 0008 ]
An air motor 9 that is operated by compressed air is arranged above the magazine 6 so that a driver bit housed in the housing 2 is driven to rotate via a speed reduction mechanism 10 composed of a plurality of gears. I have to. A contact member 11 that is operated in contact with the surface of the construction material is disposed at the distal end portion of the nose portion 4 so as to protrude in the distal direction of the injection port 5, and this contact member 11 is pressed against the surface of the construction material. The fastener driving machine 1 is activated by being actuated and operated by a trigger lever 12 arranged at the base of the grip portion 3 by hand.
[ 0009]
As shown in FIG. 3, a cylinder 14 in which a piston 13 is slidably accommodated is disposed in the housing 2, and a screw head and a screw head are disposed on the lower end surface of the piston 13 accommodated in the cylinder 14. A driver bit 15 that engages and rotates the screw is coupled. The driver bit 15 is slidably guided in the injection port 5 formed in the nose portion 4, and the piston 13 is introduced into the cylinder 14 by the compressed air, and the compressed air pressure causes the piston 13 to move upward. The driver bit 15 is propelled in the injection port by being operated from the dead point toward the bottom dead center contacting the bumper 16 disposed in the lower portion of the housing 2. The tip of the driver bit 15 engages with the head of the screw supplied into the injection port 5 to push out the screw from the injection port 5.
[ 0010 ]
Inside the grip portion 3 is formed an air chamber 18 connected to a compressed air source via an air plug 17 attached to the rear end of the grip portion 3, and the air chamber 18 and the cylinder 14 are connected to each other. It communicates via a main valve 19 arranged at the upper part of the cylinder 4. The main valve 19 is operated so as to open and close the inside of the cylinder 14 and the air chamber 18 by the operation of a trigger valve 20 formed at the base of the grip portion 3. The trigger valve 20 is actuated by a trigger lever 12 operated by a finger holding the grip part 3 and a contact member 11 operated by a construction material.
[ 0011 ]
The driver bit 15 is rotatably held and coupled to the lower surface side of the piston 13 and has a hexagonal cross section. The driver bit 15 is rotatably disposed in the lower portion of the housing 2. It penetrates through a hexagonal opening formed in the center of the rotor 21, and the rotor 21 and the driver bit 15 are connected so as to be relatively slidable and rotatable integrally. Accordingly, the driver bit 15 is slidable in the screw tightening direction as the piston 13 is operated, and is rotated integrally with the rotor 21 as the rotor 21 rotates.
[ 0012 ]
The air motor 9 is connected to the downstream side of the main valve 19, and the main valve 19 is opened so that a part of the compressed air introduced into the cylinder 14 is supplied to the air motor 9. Further, the output shaft of the air motor 9 is connected to the rotor 21 via a speed reduction mechanism 10 constituted by a plurality of gears. Therefore, compressed air is introduced into the cylinder 14 and the piston 13 is connected to the driver bit 15. The air motor 9 is rotationally driven almost simultaneously with the propulsion driving of the motor, and when the air motor 9 is driven, the rotor 21 is rotated via the speed reduction mechanism 10 and the driver bit 15 is rotationally driven via the rotor 21 so that the nose portion 4 The screw N arranged in the injection port 5 is rotated.
[ 0013 ]
As shown in FIG. 1 to FIG. 3 and FIG. 4, mark display means 22 is formed on the lower surface of the magazine 6 to mark the screw fastening positions at equal intervals on the surface of the construction material. The mark display means 22 holds the mark forming member 23 formed with a sharp pointed portion 24 projecting from the bottom of the magazine 6 toward the surface of the construction material and the mark forming member 23 at the bottom of the magazine 6. It is comprised by the holder part 25 which is. As shown in detail in FIG. 4, the holder portion 25 formed in a hollow shape is integrally attached to the bottom surface of the bottom of the magazine 6, and the inside of the holder portion 25 faces the direction of the injection port 5. An arranged guide rod 26 is provided, and the mark forming member 23 is held movably with respect to the guide rod 26. The mark forming member 23 is screwed into an adjustment screw rod 27 arranged in parallel with the guide rod 26, and the adjustment screw rod 27 is operated by rotating an adjustment knob 28 arranged outside the holder portion 25. Is rotated to move the mark forming member 23 along the guide rod 26 so that the distance from the center of the injection port 5 of the fastener driving machine 1 can be varied.
[ 0014 ]
The pointed tip 24 of the mark forming member 23 is disposed so as to protrude downward from an opening 29 formed at the bottom of the holder portion 25, and the pointed portion 24 of the mark forming member 23 is formed on the fastener driving machine 1. When the injection port 5 is arranged so as to be perpendicular to the surface of the construction material W and the contact member 11 is pressed against the surface of the construction material W and screwed, the pointed portion 24 of the mark forming member 23 is the construction material. The height is set so that the screw tightening position can be marked on the surface of the construction material W by being pressed against the surface of W.
[ 0015 ]
Hereinafter, the state of the screw tightening operation when performing screw tightening on the vertical wall surface by the fastener driving machine 1 according to the above embodiment will be described with reference to FIG. Normally, the fastener driving machine 1 is gripped with the nose portion 4 upward, and the injection port 5 is arranged so as to be perpendicular to the construction material W, and screw tightening is performed while moving the construction material W from the upper side to the lower side. Do. The center of the injection port 5 of the fastener driving machine 1 is positioned at the first screw tightening position, the contact member 11 is pressed, and the trigger lever 12 is operated to drive the fastener driving machine 1.
[ 0016 ]
When the trigger lever 12 and the contact member 11 are operated, the main valve 19 is opened via the trigger valve 20, the compressed air in the air chamber 18 is supplied to the air motor 9, and the air motor 9 is rotationally driven to drive the driver bit 15. Is driven to rotate. A part of the compressed air is introduced into the cylinder 14 to drive the piston 13 from the top dead center position to the bottom dead center direction within the cylinder 14, and the driver bit 15 is directed toward the tip of the injection port 5 in the injection port 5. Driven. The screw N supplied to the injection port 5 is rotated by the driver bit 15 and is propelled and driven in the distal direction of the injection port 5 to be screwed into the construction material W.
[ 0017 ]
When the first screw tightening is performed on the upper side of the construction material W as described above, the mark forming member 23 has a pointed end portion on the surface of the construction material W that is a predetermined distance away from the initial screw tightening position. Since the mark is engraved by 24, the center of the injection port 5 of the nose portion 4 is moved to this mark position and the fastener driving machine 1 is driven to perform screw tightening from the upper side of the construction material W. Screwing can be performed at a predetermined pitch interval toward the lower side.
[ 0018 ]
When changing the screw tightening interval due to the difference in screw size or construction material W, etc., the adjustment screw 28 is rotated by rotating the adjustment knob 28 arranged outside the holder portion 25. The position of the mark forming member 23 can be changed so that the distance from the center of the injection port 5 to the pointed portion 24 is a predetermined distance.
[ 0019 ]
In the above embodiment, a mark is formed on the surface of the construction material W by stamping the mark forming member 23 formed with the sharp pointed portion 24 against the surface of the construction material W, to form a felt-tip pen-like mark forming member 23 impregnated with ink or pigment, a mark by the ink or pigment may be caused to color display on the surface of the construction material W. Further, the present invention can be applied to fastener driving machine in general driving a fastener nails or staples not limited to screw tightening machine shown in the above examples.
[ 0020 ]
【The invention's effect】
As described above, according to the present invention, during the operation of driving the fastener driving machine and driving the fastener, a mark for indicating the fastener driving position is formed on the surface of the construction material that is a predetermined distance away from the injection port. Therefore, the fasteners can be driven into the construction material at equal intervals, the predetermined construction strength can be maintained, and it is possible to prevent the pitch from being distorted and the screws and nails from being wasted. In addition, by configuring the mark forming member so that the position from the center of the injection port can be variably adjusted, it is possible to cope with fastener driving at an appropriate interval according to the size of the construction material, the screw to be used, and the nail.
[Brief description of the drawings]
FIG. 1 is a side view of a screw tightening machine in which a fastener driving position marking device of the present invention is implemented. FIG. 2 is a perspective view showing a bottom side of the same fastener driving machine as in FIG. 1. FIG. Longitudinal side view of the driving machine [FIG. 4] Longitudinal side view of the fastener driving position marking device of the same fastener driving machine as in FIG. 1 [FIG. 5] Screw tightening operation using the same fastener driving machine as in FIG. Side view showing the state of the [signs]
DESCRIPTION OF SYMBOLS 1 Fastener driving machine 4 Nose part 5 Injection port 6 Magazine 22 Mark display means 23 Mark formation member 24 Pointed part 25 Holder part 26 Guide rod 27 Adjustment screw rod 28 Adjustment knob 29 Opening

Claims (2)

A driver bit that is slidably guided in an injection port formed in the nose portion, a housing that houses a drive mechanism that drives the driver bit in the injection port, and a plurality of fasteners that are connected to the nose portion and that are connected to the nose portion in the a magazine, said driver bit by propulsion drive at the exit, the fastener driving machine in which the fastener is fed to an injection mouth of the nose portion so driven into the construction material disposed on the tip of the injection port, on the bottom of the magazine, fastener strokes, characterized in that a mark display means having a marking visible tip pressed against the surface of the construction material when pressed against the exit to the surface of the construction material Fastener driving position marking device for inserter. The fastener of the fastener driving machine according to claim 1 , wherein the mark forming member is held by a holder portion attached to the bottom surface of the magazine so that the distance from the center of the injection port can be variably adjusted. Driving position marking device.

Images